Boiler



G. S. KENT.

BOILER- APPLICATION FILED JAN. 22, I918.

Patented Oct. 5,1920.

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A TTUR/VEVS.

G. S. KENT.

BOILER.

APPLICATION FILED- IAN. 22, ms.

Patented Oct. 5, 1920.

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G. S. KENT.

Patented Oct 5,1920.

3 SHEETS-SHEET 3.

PATENT OFFICE.

GEORGE SAMUEL KENT, 0F BUFFALO, NEW YORK.

BOILER.

Specification of Letters Patent.

Patented Oct. 5, 1920.

Application filed January 22, 1918. Serial No. 213,242.

To all w hem it may concern Be it known that I, GEORGE S. KENT, acitizen of the United States, residing at Buffalo, in the county of Erieand State of New York, have invented a new and useful Improvement inBoilers, of which the following is a specification.

This invention relates to hot water or steam boilers of the kind adaptedmore particularly to be used for heating buildings.

The objects of the invention are to provide a boiler of this kind inwhich soft or bituminous or other cheaper grades of fuel can beefiiciently used without producing the objectionable smoke and sootwhich generally accompanies the use of fuels of this kind; also toconstruct a boiler of this kind in such a manner that the'fires will'beinclosed by water jacketed parts of the boiler, so that the mostefficient use is made of the heat of the fire; also to provide a boilerof this kind with two separate furnaces from which the gases ofcombustion pass to a common combustion chamber, to produce a practicallysmokeless consumption of the fuel; also to so arrange the water tubes,fire tubes and other parts of the boiler as to utilize most eificientlythe heat of the fuel and to interfere as little as possible with theflow of gases to the chimney; also to provide the boiler with aplurality of water elevation thereof.

bars which areformed integral with the boiler sections and which act assupporting walls for the furnaces; also to improve the construction ofdevices of this kind in other respects hereinafter specified.

In the accompanying drawings:

Figure 1 is a front elevation for a boiler embodying the invention.

Fig. 2 is a longitudinal central sectional Fig. 3 is a front elevation,partly broken away, of the front section of the boiler, showing thedoors removed therefrom.

Fig. 4 is a sectional elevation of the boiler on line 44, Fig. 2.

Figs. 5 and 6 are sectional elevations thereof, partly on lines 5'5 and66, respectively, Fig. 2, and partly broken away to show the interior ofthe sections.

The boiler shown consists of a plurality of transverse sections whichare secured to gether in the usual manner to enable the water to flowfrom one section to another and to form fire and combustion chambersand. passages for the products of combuss tion to the chimney. Theboiler comprises a front section A which forms the front wall of theboiler, a second section B arranged in rear of the front section, aplurality of intermediate sections C, a section D arranged in rear ofthe intermediate sections, and a rear section or water wall E whrchforms the rear of the boiler. These sections are connected with eachother by means of the usual sleeves or thimbles a which are secured inoppositely disposed holes in adjacent sections to form passages for thewater from one section to another, and all of the sections are heldtogether by means of the usual tie rods or the like 6 extending throughlugs or projecting portions Z) formed on the sections. The front sectionis provided with the usual feed openings a through which the fuel issupplied to the boiler, the ash openings (6 through which the ashes maybe removed, an opening a by means of which access may he had to thecombustion chamber, and an opening at in the upper part of the boilerthrough which this part of the boiler may be cleaned. The feed openingsat are closed by furnace or feed doors F; the ash openings a are closedby ash doors 7, and the opening a is preferably closed by means of doorsf. The opening a may be closed by any suitable means, such for exampleas a plug or the like I The boiler shown in the drawings is providedwith two furnaces or fire chambers G, each provided with grates g onwhich the fuel rests, the portions below the grates forming ash pits g.The two furnaces are preferably arranged at opposite sides of the boilerand are preferably surrounded by water-j acketed portions of the boilersections and are formed by means of openings or spaces in the sectionsB, C and D of the boiler. Between the twofire chambers is arranged acombustion chamber H into which the gases of combustion pass fromopposite sides of the furnace and through which gases pass toward therear of the boiler. In order to permit the gases to flow from thefurnaces to the combustion chamber H, the sections B and C of the boilerare provided with reduced portions or water bars or legs h which are soconstructed as to form spaces or slits between the adjacent sectionsthrough which the gases of combustion can pass into the combustionchamber. The water legs terminate at their upper ends arch or crownportions 71/ which, when the sections of the boiler are connected,prevent the passage of the gases upwardly and divide the two ash spacesand which is connected at its lower end by "means of substantiallyhorizontal portions 72 with the upright water walls at the sides of thesections. By means of the construction shown, the gases of combustionfrom the furnaces enter into thecombustion chamber H where a completecombustion of the gases takes place. T-hecombustion chamber as well asthe furnaces and theash spaces are surrounded on all sides bywater-jacketed portions of the boiler, so that very efficient use ismade of the heat of the fires The section D of the furnace is notprovided with the arch member it, so that the gases of combustion flowrearwardly in the I boiler.

combustionchamber toward the section D, in which they flow upwardly intothe water tube space or passage I of the boiler and then forwardlytoward the front section A. I'Vithin the water tube space I are arrangeda plurality of water tubes K which extend lengthwise of the space I in adirection substantially parallel to thefiow of gases in this space andterminate at their opposite ends in the front and rear sections A and Eof the represents plugs in the front and rear sections which can beremoved to afford access to the water tubes K. 7 By means of thisarrangement of the water tubes, the flow of gases in the chamber I isnot interfered with to any material extent and a large amount of heat istransmitted from the gases to the Water in the tubes K; By"

means of these longitudinal water tubes, the usual baffle plates whichdeflect the current of gases against the water-jacketed walls of thefurnaces for the purpose of causing the gases to deliver their heat tothe water, are. eliminated and the flow of gas through the chamber I andthe exchange of heat from the gases to the water are facilitated.

The. roof or upper part of the chamber I is formed'by means of aplurality of water spaces L in the boiler sections 0 and D, throughwhich fire tubes Z extend which conduct the products of combustion froma gas space Z to a flue or chimney M. The gas space Z is formed partlyin the boiler sectubespace I with the gas space Z. The fire tubes Z maybe of any usual or suitable construction and connect at their front endswith the foremost of the intermediate members C and at their rear endswith the rear wall of the section E. The fire tubes preferably passthrough a plurality of holes Z formed in the adjacent walls of theintermediate sections G and the sections D and E, these holes beingpreferably considerably larger than the outside diameter of the firetubes Z so that the water is free to'circulate around the fire tubesthroughout the length 7 thereof, thus preventing unequal expansionformed to provide two fire chambers ar-' ranged at opposite sides of theboiler, a combustion chamber into which the gases pass from the two firechambers. a return above said combustion chamber into which the gasespass fromthe combustion chamber at the rear of the boiler and in whichthe gases pass to the front of the boiler, and fire tubes extending fromthe front portion of the boiler to the rear section thereof and throughwhich the gases pass from the front to the rear of the boiler.

2. A boiler comprising a plurality of transverse sectionssecured'together to form water spaces and spaces for the fire andproducts of combustion, said sections being formed. to provide two firechambers arranged at opposite sides of the boiler, a combustion chamberinto which the gases pass from the two fire chambers, a return passageabove said combustion chamber into which the gases pass from thecombustion chamber at the rear of the boiler and in which the gases passto the front of the boiler. water tubes in said return passage, and firetubes extending from the front portion of the boiler to the rear sectionthereof and through which the gases pass from the front to the rear ofthe boiler.

3. A boiler comprising a plurality of transverse sections securedtogether and provided with connecting passages for water to circulatethrough the sections. said sections being formed to provide a firechamher and a passage through which the prodtion ,A andpartly 1n thesecond section B which has a gas space connecting the water nets ofcombustion pass. water tubes an ranged in said passage and exposed tothe heat of the gases. and fire tubes extending through said boilerthrough which the gases pass, said fire chamber and passage for theproducts of combustion all being inclosed in Water compartments of saidboiler.

1. A boiler comprising a plurality of transverse sections securedtogether and provided With connecting passages for Water to circulatethrough the sections, said sections being formed to provide a firechamber and a passage through which the products of combustion pass, andfire tubes extending through said sections and through which said gasespass from said passage, said sections being provided with holes throughwhich said fire tubes extend, said holes being larger in diameter thanthe tubes to permit Water to circulate around said tubes.

5. A boiler comprising a plurality of transverse sections securedtogether and provided with connecting passages for Water to circulatethrough the sections, and fire tubes extending through said sections andthrough which said gases pass, said sections being provided With holesthrough which said fire tubes extend, said holes being larger indiameter than the tubes to permit Water to circulate around said tubes.

Witness my hand, this 21st day of January, 1918.

GEORGE SAMUEL KENT. Witnesses:

M. J. PITMAN, A. L. MOGEE.

